一些公司只与那些获得进入公司内部网的固定交易伙伴进行在线交易,通过这种方式来降低风险。conducting 属于动名词,位于介词by之后,动词都要+ing。Some companies 是主语are limiting 是谓语the risk 是宾语by conducting online transactions only with established business partners who are given access to the company " s private intranet. 是方式状语(其中who are given access to the company " s private intranet. 是个定语从句修饰partners )